2026-10-09 APP 2.0.0-beta48 has been released !
This is mainly a bug fix release for the reported bugs in beta47. In addition it has a significant User Interface performance improvement noticable when you need to process 1000s of images in APP.
2026-10-03 APP 2.0.0-beta47 has been released !
This is a very big release... many code optimizations/rewrites, many parts of APP are much faster and more precise, especially star analysis and registration are much faster ! Big mosaics will go much faster 🙂
And we introduce a new preview filter, which includes the new Adaptive Deep Sky Stretch and a General Levels Stretch, this has been long over due. The old preview filter (the panel on the right side to stretch and preview your data) has not been updated for a couple of years and it is a critical part of any APP session.
Adaptive Deep Sky Stretch or ADSS is a much more intuitive stretch algorithm. It is also color preserving (which is a great new addition in itself ! ) which means that the highlights are no longer bleached, color is maintained from the linear data while stretching. You can simply stretch your data using the sky background level and signal width sliders which work much easier and more intuitive. You no longer need to fiddle with the old complicated sliders with zoom buttons. All the zoom buttons for the sliders are made redundant. And you can enter slider values in the slider value fields yourself. I will make a youtube video in the coming days to explain and fully introduce ADSS. Once the video is ready, it will be highlighted on the forum.
RGB Combine upgrade !. The RGB Combine Tool has been rewritten mostly. The tool is faster and easier to use and most importantly, the Luminance slider to inject a luminance channel or channels into the RGB composite is now working correctly. It no longer bleaches the RGB colors. Combined with the new ADSS preview, you will get much better and easier great composites with great color! I will also explain this in a new youtube video.
Hi everyone, I'm trying to figure out my workflow for integrating data from the ASI294 OSC and monochrome cameras. My goal is to have RGB star colors with narrowband data, however I'm coming across an error during the normalization phase. I am creating separate sessions for the RGB, Ha, Oiii, and Sii and assigning the calibration frames to their respective filter sessions and I'm not forcing CFA Bayer as the RGGB matrix is already in the fits headers from what I have read so far is correct and I've selected the default adaptive airy disc algorithm supported bayer pattern, and everything is working well until about 56% into the normalization when I come across this error each time I've tried. Is normalization necessary in a workflow like this or should I be selecting a specific mode, method, or scale?
 Thanks
Eric
Combining Ha (or any narrowband data) with RGB data is not yet possible like that. You can load your RGB data and its calibration data, calibrate them and then save the the separate channels (R, G and B) as mono data, using the "split channels" option in tab 2, all the way down.
Now having mono R, G and B, you can proceed to load those in together with the Ha and proceed with making R, G, B and Ha integrations. These can then be combined in the RGBCombine tool.
